diff --git a/Lib/pickle.py b/Lib/pickle.py
index aca8fd1..fdeadee 100644
--- a/Lib/pickle.py
+++ b/Lib/pickle.py
@@ -23,8 +23,6 @@
 
 """
 
-__version__ = "$Revision$"       # Code version
-
 from types import FunctionType, BuiltinFunctionType
 from copyreg import dispatch_table
 from copyreg import _extension_registry, _inverted_registry, _extension_cache
diff --git a/Lib/pydoc.py b/Lib/pydoc.py
index 548e71c..89d00a3 100755
--- a/Lib/pydoc.py
+++ b/Lib/pydoc.py
@@ -37,7 +37,6 @@
 __author__ = "Ka-Ping Yee <ping@lfw.org>"
 __date__ = "26 February 2001"
 
-__version__ = "$Revision$"
 __credits__ = """Guido van Rossum, for an excellent programming language.
 Tommy Burnette, the original creator of manpy.
 Paul Prescod, for all his work on onlinehelp.
diff --git a/Lib/tarfile.py b/Lib/tarfile.py
index 6b663f4..8129a80 100644
--- a/Lib/tarfile.py
+++ b/Lib/tarfile.py
@@ -29,8 +29,6 @@
 """Read from and write to tar format archives.
 """
 
-__version__ = "$Revision$"
-
 version     = "0.9.0"
 __author__  = "Lars Gust\u00e4bel (lars@gustaebel.de)"
 __date__    = "$Date$"
diff --git a/Lib/tkinter/__init__.py b/Lib/tkinter/__init__.py
index e54c53f..ee87147 100644
--- a/Lib/tkinter/__init__.py
+++ b/Lib/tkinter/__init__.py
@@ -30,8 +30,6 @@
 tk.mainloop()
 """
 
-__version__ = "$Revision$"
-
 import sys
 if sys.platform == "win32":
     # Attempt to configure Tcl/Tk without requiring PATH
diff --git a/Lib/xml/parsers/expat.py b/Lib/xml/parsers/expat.py
index a805b82..bcbe9fb 100644
--- a/Lib/xml/parsers/expat.py
+++ b/Lib/xml/parsers/expat.py
@@ -1,6 +1,4 @@
 """Interface to the Expat non-validating XML parser."""
-__version__ = '$Revision$'
-
 import sys
 
 from pyexpat import *
diff --git a/Misc/NEWS b/Misc/NEWS
index b3d21f8..63a9ded 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -184,6 +184,10 @@
 Library
 -------
 
+- Issue #12221: Remove __version__ attributes from pyexpat, pickle, tarfile,
+  pydoc, tkinter, and xml.parsers.expat. This were useless version constants
+  left over from the Mercurial transition
+
 - Issue #12085: Fix an attribute error in subprocess.Popen destructor if the
   constructor has failed, e.g. because of an undeclared keyword argument. Patch
   written by Oleg Oshmyan.
diff --git a/Modules/pyexpat.c b/Modules/pyexpat.c
index 1cf699b..d923eeb 100644
--- a/Modules/pyexpat.c
+++ b/Modules/pyexpat.c
@@ -1662,7 +1662,6 @@
     PyObject *errors_module;
     PyObject *modelmod_name;
     PyObject *model_module;
-    PyObject *version;
     PyObject *sys_modules;
     PyObject *tmpnum, *tmpstr;
     PyObject *codes_dict;
@@ -1699,10 +1698,6 @@
     Py_INCREF(&Xmlparsetype);
     PyModule_AddObject(m, "XMLParserType", (PyObject *) &Xmlparsetype);
 
-    version = PyUnicode_FromString(PY_VERSION);
-    if (!version)
-        return;
-    PyModule_AddObject(m, "__version__", version);
     PyModule_AddStringConstant(m, "EXPAT_VERSION",
                                (char *) XML_ExpatVersion());
     {
diff --git a/Objects/typeslots.inc b/Objects/typeslots.inc
index 5186dcf..caa1e03 100644
--- a/Objects/typeslots.inc
+++ b/Objects/typeslots.inc
@@ -1,4 +1,4 @@
-/* Generated by typeslots.py $Revision$ */
+/* Generated by typeslots.py */
 0,
 0,
 offsetof(PyHeapTypeObject, as_mapping.mp_ass_subscript),
diff --git a/Objects/typeslots.py b/Objects/typeslots.py
index 2e00c80..b24c7f4 100644
--- a/Objects/typeslots.py
+++ b/Objects/typeslots.py
@@ -3,7 +3,7 @@
 
 import sys, re
 
-print("/* Generated by typeslots.py $Revision$ */")
+print("/* Generated by typeslots.py */")
 res = {}
 for line in sys.stdin:
     m = re.match("#define Py_([a-z_]+) ([0-9]+)", line)
diff --git a/Tools/unittestgui/unittestgui.py b/Tools/unittestgui/unittestgui.py
index b526646..09a20e2 100644
--- a/Tools/unittestgui/unittestgui.py
+++ b/Tools/unittestgui/unittestgui.py
@@ -28,7 +28,6 @@
 """
 
 __author__ = "Steve Purcell (stephen_purcell@yahoo.com)"
-__version__ = "$Revision: 1.7 $"[11:-2]
 
 import sys
 import traceback
diff --git a/configure b/configure
index a3f2a3e..f9cccf2 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Revision.
+# From configure.in HGVERSION.
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.65 for python 3.3.
 #
@@ -638,10 +638,6 @@
 INSTALL_PROGRAM
 HAS_PYTHON
 DISABLE_ASDLGEN
-HAS_HG
-HGBRANCH
-HGTAG
-HGVERSION
 ARFLAGS
 AR
 RANLIB
@@ -692,6 +688,10 @@
 CONFIG_ARGS
 SOVERSION
 VERSION
+HAS_HG
+HGBRANCH
+HGTAG
+HGVERSION
 target_alias
 host_alias
 build_alias
@@ -2687,6 +2687,66 @@
 
 
 
+
+
+
+
+if test -e $srcdir/.hg/00changelog.i
+then
+# Extract the first word of "hg", so it can be a program name with args.
+set dummy hg; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_HAS_HG+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$HAS_HG"; then
+  ac_cv_prog_HAS_HG="$HAS_HG" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_HAS_HG="found"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  test -z "$ac_cv_prog_HAS_HG" && ac_cv_prog_HAS_HG="not-found"
+fi
+fi
+HAS_HG=$ac_cv_prog_HAS_HG
+if test -n "$HAS_HG"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $HAS_HG" >&5
+$as_echo "$HAS_HG" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+else
+HAS_HG=no-repository
+fi
+if test $HAS_HG = found
+then
+    HGVERSION="hg id -i \$(srcdir)"
+    HGTAG="hg id -t \$(srcdir)"
+    HGBRANCH="hg id -b \$(srcdir)"
+else
+    HGVERSION=""
+    HGTAG=""
+    HGBRANCH=""
+fi
+
+
+
 ac_config_headers="$ac_config_headers pyconfig.h"
 
 
@@ -5139,64 +5199,6 @@
 fi
 
 
-
-
-
-if test -e $srcdir/.hg/00changelog.i
-then
-# Extract the first word of "hg", so it can be a program name with args.
-set dummy hg; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_HAS_HG+set}" = set; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$HAS_HG"; then
-  ac_cv_prog_HAS_HG="$HAS_HG" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
-    ac_cv_prog_HAS_HG="found"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-  test -z "$ac_cv_prog_HAS_HG" && ac_cv_prog_HAS_HG="not-found"
-fi
-fi
-HAS_HG=$ac_cv_prog_HAS_HG
-if test -n "$HAS_HG"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $HAS_HG" >&5
-$as_echo "$HAS_HG" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-else
-HAS_HG=no-repository
-fi
-if test $HAS_HG = found
-then
-    HGVERSION="hg id -i \$(srcdir)"
-    HGTAG="hg id -t \$(srcdir)"
-    HGBRANCH="hg id -b \$(srcdir)"
-else
-    HGVERSION=""
-    HGTAG=""
-    HGBRANCH=""
-fi
-
-
 DISABLE_ASDLGEN=""
 # Extract the first word of "python", so it can be a program name with args.
 set dummy python; ac_word=$2
diff --git a/configure.in b/configure.in
index 49932de..71f488d 100644
--- a/configure.in
+++ b/configure.in
@@ -7,8 +7,30 @@
 
 AC_PREREQ(2.65)
 
-AC_REVISION($Revision$)
 AC_INIT(python, PYTHON_VERSION, http://bugs.python.org/)
+
+AC_SUBST(HGVERSION)
+AC_SUBST(HGTAG)
+AC_SUBST(HGBRANCH)
+
+if test -e $srcdir/.hg/00changelog.i
+then
+AC_CHECK_PROG(HAS_HG, hg, found, not-found)
+else
+HAS_HG=no-repository
+fi
+if test $HAS_HG = found
+then
+    HGVERSION="hg id -i \$(srcdir)"
+    HGTAG="hg id -t \$(srcdir)"
+    HGBRANCH="hg id -b \$(srcdir)"
+else
+    HGVERSION=""
+    HGTAG=""
+    HGBRANCH=""
+fi
+
+AC_REVISION(HGVERSION)
 AC_CONFIG_SRCDIR([Include/object.h])
 AC_CONFIG_HEADER(pyconfig.h)
 
@@ -808,27 +830,6 @@
         ARFLAGS="rc"
 fi
 
-AC_SUBST(HGVERSION)
-AC_SUBST(HGTAG)
-AC_SUBST(HGBRANCH)
-
-if test -e $srcdir/.hg/00changelog.i
-then
-AC_CHECK_PROG(HAS_HG, hg, found, not-found)
-else
-HAS_HG=no-repository
-fi
-if test $HAS_HG = found
-then
-    HGVERSION="hg id -i \$(srcdir)"
-    HGTAG="hg id -t \$(srcdir)"
-    HGBRANCH="hg id -b \$(srcdir)"
-else
-    HGVERSION=""
-    HGTAG=""
-    HGBRANCH=""
-fi
-
 AC_SUBST(DISABLE_ASDLGEN)
 DISABLE_ASDLGEN=""
 AC_CHECK_PROG(HAS_PYTHON, python, found, not-found)
diff --git a/setup.py b/setup.py
index fa42191..896d604 100644
--- a/setup.py
+++ b/setup.py
@@ -1,8 +1,6 @@
 # Autodetecting setup.py script for building the Python extensions
 #
 
-__version__ = "$Revision$"
-
 import sys, os, imp, re, optparse
 from glob import glob
 import sysconfig